GOST 31371.5-2022
Natural gas. Determination of composition and associated uncertainty by gas chromatography. Part 5. Determination of nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons by Isothermal method

Scope: This standard establishes a procedure for the quantitative determination of the content of nitrogen, carbon dioxide and C1 - C5 hydrocarbons individually and the total content of C6+, represented by all hydrocarbons with a carbon number of 6 or higher, in natural gas samples by gas chromatography. This standard applies to the analysis of natural gas within the operating ranges given in Table 1

GOST 31371.5-2022 history

2022 GOST 31371.5-2022 Natural gas. Determination of composition and associated uncertainty by gas chromatography. Part 5. Determination of nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons by Isothermal method
2008 GOST 31371.5-2008 Natural gas. Determination of composition with defined uncertainty by gas chromatography method. Part 5. Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line process application using three columns